#7 New Form

* adds NewEmaForm and EditEmaForm
* refactors ResponsibilityData related form fields into reusable mixin CompensationResponsibleFormMixin
   * used in NewEcoAccountForm and NewEmaForm for easier maintaining and reducing amount of code
* refactors templates /xy/new/view.html into /xy/form/view.html since the same template file is used for new and edit forms

intervention/templates/intervention/form/view.html

@@ -0,0 +1,6 @@
+{% extends 'base.html' %}
+{% load i18n l10n %}
+
+{% block body %}
+    {% include 'form/main_data_collapse_form.html' %}
+{% endblock %}